Kate Carr’s “Once Upon a Rose Coloured Time” is a piece of nature-infused ambient music. It’s all rustling leaves, birdsong, and a slow foundation of pure droning sonic billow. Two components stand out from the naturalist undercurrent, nudge it from background audio to foreground listening. There is a gentle guitar line that arrives about halfway through, and there is a brief, upward, single-note melodic line. The latter may, in fact, be a snippet of birdsong set on loop. That, as a result, it brings to mind, quite favorably, Brian Eno’s Thursday Afternoon is a sign of just how well those naturalist and sonic tendencies overlap.